LATIN DICTIONARYLexicon Latīnum
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“wave” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

wave s.
unda (the proper word; produced by the regular motion of the sea, or gentle action of the air): fluctus, -us (billow, raised by storms). Full of waves, undosus: fluctuosus: to move in waves, undare: fluctuare: to make waves, fluctus ciere, movere: to be tossed in the waves, fluctuare: fluctibus jactari (Cic.): the wind rolls the waves upon the shore, ventus crebros ex alto fluctus in litus evolvit (Curt.): the waves break upon the rocks, fluctus franguntur a saxo (Cic.): to be washed by the waves, fluctibus allui: in waves, undatim.
wave v.
Intransitively. To move as a wave, play loosely, float, undare (as a gentle wave): fluctuare (as a billow); also, aestuare (of very violent motion). Corn waves, segetes undant: hair waves, coma fluitat, defluit de humeris alicujus: a garment waves, vestis sinuatur, undat.
Transitively. To move to and fro, agitare: movere: to wave a sword, ensem rotare: to wave the hand, manum jactare.
To omit, pass over, Vid.

Quick answer

What is the Latin word for wave?
The usual Latin words for “wave” are unda, flūctus, undōsus; also flūctuōsus, undō, flūctuō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.